Bi-directional Seal Metal Seated Triple Offset Butterfly Valve
Bi-directional Seal Metal Seated Triple Offset Butterfly Valve
Introduction
With years of research and development, our
triple eccentric butterfly valve has he benefits of less weight, less cost,
zero friction and zero leakage. The triple eccentric design makes no friction
between the disc and body seat. The low torque shall certainly reduce the
ownership cost.
Design
Benefits
Metal seated, triple offset design provides
bi-directional zero leakage shutoff
Self-centering disc prevents binding due to
thermal shaft expansion.
Clamped seal ring with flat gasket provides
even compression and consistent sealing performance.
Supported Shaft prevents shaft deflection
and seal leakage
Inherently fire-safe desing
Difference between double offset butterfly valve and
triple offset butterfly valve
Bi-directional Seal Metal Seated Triple Offset Butterfly Valve
Double offset
butterfly valve is known as high performance butterfly valve. There are two
stem offset from the center. This creates a cam action during the application’s
process. The double offset butterfly valve is up to ANSI Class600 rating in
carbon steel, stainless steel, hastelloy and other body material, with
variation of Teflon seat and also fire safe design with metal back up seats.
For the triple
offset butterfly there are three offsets. Two are placed in a similar position
to the double offset butterfly valve, while the third offset is the geometry of
the seating surface, creating a type of cone shape of the disc and seat. The
design allows the disc to seal against the seat with no friction. It has
advantages of lower cost, lower torque, option, than alternative style metal
seated valves.
The triple offsets are generally used in applications similar to gate valves, where a metal seat is required and tight shutoff and/or quarter turn actuation is desired. The triple offset valve is used in similar industries as the double offset butterfly valve, but in more demanding applications.
